[Doc] Create a "How to verify AETHER installation" guide

[TechieSamosa]

Write a VERIFICATION.md file that guides users on how to run a dummy test with a small random tensor.

[TechieSamosa]

If you have questions about this task, please ask in the GitHub Discussions board. Please comment 'I would like to work on this' to be assigned!

[Vrindakr3300]

Hi! I'd like to work on this issue. Please assign it to me.

[TechieSamosa]

You've worked on one issue already. Please wait and participate in GSSoC'26 to work on them further. Can't assign anything to you right now.

[Vrindakr3300]

Thank you for the clarification. I have submitted my GSSoC'26 application and am currently waiting for review. Please let me know if there are any additional requirements before I can work on more issues in this repository.

[shresthbhargava]

assign it to me i will do it under gssoc'26